146 V. L. KELLOGG AND J H. PAINE—ANOPLURA AND 
entirely across the abdomen ; this is the suture between segments 5 and 6. Last 
segment angularly emarginate behind, forming two tooth-like pieces ; when these 
pieces are brought together their tips meet behind a small open space. All 
segments with distinct brownish black lateral blotches just inward from the 
spiracles, each of which is set in a small brown circular spot ; on the middle of 
the segments are pairs of short lateral brown bars, thicker and shorter on the 
posterior segments (PI. IV, fig. 3). 
Ma.r.—Length, 4 mm.; width, 2°24 mm. Posterior segment not emarginate 
(or toothed) but entire and with a conspicuous tuft of several short hairs in each 
postero-lateral angle (PI. LV, fig. 6). 
Linognathus vituli (Linn.) Dalla Torre. 
Specimens from calf, Songwe River, N. Nyasa (Dr. J. B. Davey). 
Linognathus africanus, sp. n. (Pl. IV, figs. 1, 5). 
Males and females from sheep, Abeokuta, Southern Nigeria, W. Africa 
(J. J. Simpson). 
This new Linognathus is rather near 1, vituli, the common long-nosed louse of 
the ox, but has a shorter and broader head, a larger, broader body and the 
antenne with the basal two segments curiously large. 
FrmMALe.—Length, 2°5 mm.; width, 1 mm.; the body of the female is thus 
only about 24 times as long as the width of the abdomen, and the head is hardly 
twice as long as broad. Head with the antenne inserted in front of the middle, 
the two basal segments being conspicuously larger than the following segments. 
Thorax at its anterior end only slightly wider than widest part of head, but 
gradually widening posteriorly. The lateral margins are straight, slightly 
diverging lines, showing some brown coloration and chitinous thickening, with 
short tapering brown chitinized lines projecting diagonally towards the middle of 
the segments. Pro-, meso-, and meta-segments all so fused as to be hardly 
distinguishable. One pair of longish, strong, almost spine-like hairs on dorsal 
surface of the meso-segment, the whole thorax otherwise without hairs. Abdomen 
broader in relation to its length than in ZL. vitul, and with entire, flatly convex 
margins. The segments are so fused that they are distinguishable only by the 
position of the spiracles and transverse dorsal rows of short hairs, there being 
five of these rows, one of which is shorter than the others, on each segment 
(P1. 1V, fig. 1). There are two or three hairs in the postero-lateral angle of each 
segment, one, then two, of these hairs getting progressively longer from the 
anterior to the posterior end of the abdomen. Last segment of female with 
entire posterior margin and few hairs. 
Mave—Length, 1°54 mm.; width, 54 mm. Last segment of abdomen with 
a small rounded projection at middle of posterior margin, and with numerous 
short spiny hairs on each side of this swelling ; one specially strong, spine-like, 
but short hair on each lateral margin of the swelling. Ground colour of whole 
abdomen pale translucent yellowish brown; the male genitalia usually showing 
through, dark brown in colour (PI. IV, fig. 5). 
